let obj={
    name:"houdunren"
};
let map=new Map([['hdcms','开源系统']]);
map.set('name','后盾人');
map.set('site','baidu.com');
map.set(obj,'houdunren');
console.log(map);
console.log(map.has('site'));
map.delete('name');
console.log(map.has('name'));
console.log(map.get(obj));
map.clear();
console.log(map.get(obj));
